spruced up vs dressed

spruced up and dressed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
spruced up	No	Yes	No	No
dressed	No	Yes	No	No

As adjectives, spruced up and dressed are synonyms defined as:

Other synonyms of spruced up include dolled up, dressed-up, dressed to kill, dressed to the nines, spiffed up, togged up.

spruced up (adjective)	dressed (adjective)
dressed in fancy or formal clothing	dressed or clothed especially in fine attire; often used in combination
	(of lumber or stone) to trim and smooth
	treated with medications and protective covering
	dressed in fancy or formal clothing